Hi all, any help or advice on this would be appreciated, car popped up with a p0131 code (sensor 1 bank 1 low voltage), have changed both sensors for brand new Bosch ones. Cleared that code and all good upon start up, idling better, no smell, then when I gave it some revs the same symptoms returned (petrol smell, spitting fuel out the exhaust, coughing and spluttering, and a sucking noise coming from what sounds like around the fuel pump area, no EML light appeared. Plugged the reader in anyway and got a p2196 (o2 sensor signal biased/stuck rich bank 1 sensor 1) 

 

Anybody had issues like this and know how to get it unstuck 🤷‍♂️🤣 is it just because there’s so much fuel lying in the system from before and it just needs time to burn off/work its way through? 
 

Thanks all. 

They don't usually overfuel that badly with a faulty lambda.  Sounds more like a separate fault that caused the overfuelling, and tricked the sensor into thinking it was faulty.  Is this a generic reader rather than Forscan?

Usually it's faulty MAP sensor that causes petrol to be seen from the exhaust.

Is the sucking sound from near the HPFP on the engine?  Sounds like there's a vacuum leak in that area so that needs to be sealed as well.